#!/bin/sh
[ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1

. /lib/functions.sh
. /lib/netifd/netifd-proto.sh

set_classless_routes() {
	local max=128
	while [ -n "$1" -a -n "$2" -a $max -gt 0 ]; do
		proto_add_ipv4_route "${1%%/*}" "${1##*/}" "$2" "$ip"
		max=$(($max-1))
		shift 2
	done
}

setup_interface () {
	proto_init_update "*" 1
	proto_add_ipv4_address "$ip" "${subnet:-255.255.255.0}"
	# TODO: apply $broadcast

	local ip_net IP PREFIX NETWORK NETMASK BROADCAST
	ipcalc "$ip/$mask" && ip_net="$NETWORK"

	local i
	for i in $router; do
		local gw_net
		ipcalc "$i/$mask" && gw_net="$NETWORK"

		[ "$ip_net" != "$gw_net" ] && proto_add_ipv4_route "$i" 32 "" "$ip"
		proto_add_ipv4_route 0.0.0.0 0 "$i" "$ip"

		local r
		for r in $CUSTOMROUTES; do
			proto_add_ipv4_route "${r%%/*}" "${r##*/}" "$i" "$ip"
		done
	done

	# CIDR STATIC ROUTES (rfc3442)
	[ -n "$staticroutes" ] && set_classless_routes $staticroutes
	[ -n "$msstaticroutes" ] && set_classless_routes $msstaticroutes

	for i in $dns; do
		proto_add_dns_server "$i"
	done
	for i in $domain; do
		proto_add_dns_search "$i"
	done

	# TODO: Deprecate timesvr in favor of timesrv
	if [ -n "$timesvr" -a -z "$timesrv" ]; then
		timesrv="$timesvr"
		echo "Environment variable 'timesvr' will be deprecated; use 'timesrv' instead."
	fi

	proto_add_data
	[ -n "$ZONE" ]     && json_add_string zone "$ZONE"
	[ -n "$ntpsrv" ]   && json_add_string ntpserver "$ntpsrv"
	[ -n "$timesrv" ]  && json_add_string timeserver "$timesrv"
	[ -n "$hostname" ] && json_add_string hostname "$hostname"
	[ -n "$message" ]  && json_add_string message "$message"
	[ -n "$timezone" ] && json_add_int timezone "$timezone"
	[ -n "$lease" ]    && json_add_int leasetime "$lease"
	[ -n "$serverid" ] && json_add_string dhcpserver "$serverid"
	proto_close_data

	proto_send_update "$INTERFACE"


	if [ "$IFACE6RD" != 0 -a -n "$ip6rd" ]; then
		local v4mask="${ip6rd%% *}"
		ip6rd="${ip6rd#* }"
		local ip6rdprefixlen="${ip6rd%% *}"
		ip6rd="${ip6rd#* }"
		local ip6rdprefix="${ip6rd%% *}"
		ip6rd="${ip6rd#* }"
		local ip6rdbr="${ip6rd%% *}"

		[ -n "$ZONE" ] || ZONE=$(fw3 -q network $INTERFACE 2>/dev/null)
		[ -z "$IFACE6RD" -o "$IFACE6RD" = 1 ] && IFACE6RD=${INTERFACE}_6

		json_init
		json_add_string name "$IFACE6RD"
		json_add_string ifname "@$INTERFACE"
		json_add_string proto "6rd"
		json_add_string peeraddr "$ip6rdbr"
		json_add_int ip4prefixlen "$v4mask"
		json_add_string ip6prefix "$ip6rdprefix"
		json_add_int ip6prefixlen "$ip6rdprefixlen"
		json_add_string tunlink "$INTERFACE"
		[ -n "$IFACE6RD_DELEGATE" ] && json_add_boolean delegate "$IFACE6RD_DELEGATE"
		[ -n "$ZONE6RD" ] || ZONE6RD=$ZONE
		[ -n "$ZONE6RD" ] && json_add_string zone "$ZONE6RD"
		[ -n "$MTU6RD" ] && json_add_string mtu "$MTU6RD"
		json_close_object

		ubus call network add_dynamic "$(json_dump)"
	fi
}

deconfig_interface() {
	proto_init_update "*" 0
	proto_send_update "$INTERFACE"
}

case "$1" in
	deconfig)
		deconfig_interface
	;;
	renew|bound)
		setup_interface
	;;
esac

# user rules
[ -f /etc/udhcpc.user ] && . /etc/udhcpc.user "$@"
for f in /etc/udhcpc.user.d/*; do
	[ -f "$f" ] && (. "$f" "$@")
done

exit 0
